Sounder attachment



(No Model.) I v G. H. CAREY 8v W. MGARTHUR.

v SOUNDER ATTACHMENT. No. 396,465. Patented Jan. 22, 1889.

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' UNITED STATES PATENT @FFICE.

GEORGE H. CAREY AND \VILLIAM MCARTHUR, OF DOLLARVILLE, l\IICHlGAN.

SOUNDER ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 396,465, dated January 22, 1889.

Application filed March 1, 1888. Serial No. 265,797. (No model.)

To all whom it may concern.-

Be it known that we, GEORGE II. CAREY and WILLIAM MOARTHUR, both of Dollarville, in the county of Luce and State of Michigan, have invented a new and Improved Sounder Attachment, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which- Figure 1 is a side elevation of our improved sounder attachment, and Fig. 2 is an end elevation of the sounding-box detached from the relay.

Similar letters of reference indicate corresponding parts in both views.

The object of our invention is to provide a resonator for telegraph relays and sounders, which will amplify the sounds of the armature-lever, so as to render it possible to .use relays or line-sounders, thereby avoiding the necessity of local sounders.

Our invention consists in the combination, with a relay or sounder, of a box of resonant material supported over the armature-lever in position to receive the blows of the said lever, the said resonator being made adjustable so that it may be accommodated to the position of the armature-lever, all as hereinafter more fully described.

The relay A is made in the usual way, the magnet B being supported at its forward end by a yoke, and at its rear end by an adjustable screw, l), passing through a post,vE, so that it may be moved back and forth by the screw for the purpose of adjustment in the usual way. The post E and yoke C are attached to a base, 1 and between posts G, secured to the yoke C, is pivoted an armaturelever H, carrying an armature, I, opposite the poles of the magnet B. The armature-lever H is provided with the usual retractile spring, a.

The standard J is secured to the base F opposite the poles of the magnet B, and the upper end of the said standard is curved over toward the magnet and provided with the fork K. In the arms Z) of the said fork are inserted adjusting-screws 0, between which is supported a resonant box L, the said screws be ing pointed and the points being received by plates (.1 attached to the sides of the resonant box L. An adjusting-screw, c, is inserted in the standard J and bears against the rear side of the box. The front side of the box is engaged by the usual contact-screw, f, passing yields a loud sound, which may be as readily interpreted as the strokes of a local sounder. Having thus described our invention, we

claim as new and desire to secure by Letters Patent 1. The combination, with the armature-le- 7o ver of a relay or sounder, of a resonant box adj ustably suspended above the sounder, with the armature-lever projecting into it, substantially as described.

2. The combination, with a relay, of a bent standard secured to the base of the relay and provided with downward]y-projecting forks on its bent end, aresonant box suspended be tween the forks of the standard by the setscrews 0, and the adjusting-screws cf, substantially as herein shown and described.

GEORGE H. CAREY. \VILLIAM MOARTHUR. YVitnesses F. O. OBEAR, J. W. BIRD.

The reso- 6o 

